Salim bin Abdullah narrates from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both) that the Prophet Muhammad (peace and blessings be upon him) said: "I saw (in a dream) that a vessel was given to me which was filled with milk. I drank from it until I was satisfied, and I felt that the milk was flowing through the veins between my skin and flesh. Some of it was left, so I gave it to Abu Bakr. The people said: O Messenger of Allah! This means knowledge, which Allah Almighty granted you, until when you were filled with it and some remained, you gave it to Sayyiduna Abu Bakr (may Allah be pleased with him). The Prophet Muhammad (peace and blessings be upon him) said: You have spoken the truth."